Method and machine for rolling plate glass



Jul} 15, 1930.

| VON REIS I IETHOD AND MACHINE FOR ROLLING PLATE GLASS Filed Aug. 19, 1927 Z amber (/0)? Herb Patented July"15, 1930 UNITED, STATES PATENT OFFICE 5 LAMBERT VON REIS, OF HERZOGENRATH, GERMANY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TOTHE AMERICAN BICHEROUX COMPANY, A CORPORATION OF DELAWARE METHOD AND MACHINE FOR ROLLING- I LATE GLASS Application filed August 19, 1927, Srial'No. 214,157, and in Germany August 28, 1926.

This invention relates to the manufacture of raw plate glass, suitable for subsequent grinding and polishing, on-glass rolling ma-" chines comprising a plurality of rolls, and it has more particularly reference to that kind of glass rollingin which the whole content of a melting pot is discharged in one turn adjacent to the forming rolls and then passed between these rolls.

In. carrying out this known method of plate glass rolling itis of the greatest importance that the liquid glass mass is fed as quickly and completely as possible to the forming pass of the rolls without disturbing the homogeneity of the glassmass or. allowing same to be affected by an excessive loss of heat. For attaining this object, it has been proposed to tilt. during the rolling the teeming plate or receiveronto which the glass mass is discharged or to use pushing devices for assisting the feeding of the glass mass to the rolls. i r

The present invention has for its object to provide for a new and improved feeding of the glass mass to the rolling mechanism. According to the-invention the content of the melting pot is deposited on one or more teeming and feeding rolls arranged in front of the lower forming roll and rotated at, a spieled smaller than'the speed of the forming r0 s.

An embodiment of the machine forming part of this invention is illustrated in-the accompanying drawing which shows a diagrammatic sectional view of ,such machine.

Fig. 1 is a diagrammatic section of a glass forming machine embodying my invention.

Fig. 2 is a similar showing but with a machlipe having a plurality of teeming and feed ro s.-

In the drawing, Fig. 1 a and d 'are the forming rolls, his a teeming and feeding roll mounted for rotation in front of the lower forming roll, 0 is a melting pot and d is the liquid glass mass, which has already been discharged from the potvand in part passed between the two forming rolls. e is a chute on which the rolled glass glides from the rolling mechanism to the receiving table g. f is a plate designed to prevent the glass mass from flowing over the roll 6 atthe front side thereof. k indicates a belt or chain drive for imparting rotation to, the roll I; from the lower one of the forming rolls which in turn are driven from any suitable source of power.;

As indicated bythe arrows, the feeding roll I) and the lower forming roll-a are rotated in the same direction in such a manner that they will both tend to feed the glass mass 0? to the forming pass between the rolls a, a If the rolls 6 and a would rotate at the same speed, the glass mass on its way to'the forming pass would sink by its gravity into the space between the rolls b and a unless this space would be bridged. Now, as already stated and as will be understood from the drawing, the speed of the roll I) is smallerthan that of the rolls a, a. The ratio of speeds may for instance be 1:2.

Owing to this difference of speed the lower forming roll a will exert a drawing action on the glass mass above the. said space and cause the mass to pass unhinderedly over the same to the forming-rolls without it being necessary to bridge the space. y

In Fig. 2 Ishow a forming machine having three teeming and feeding rolls. In this case, the feeding roll I) nearest the forming roll a while having a smaller circumferential speed than the latter will rotate at a greater speed than the following feeding roll 6', and so on. In this manner the glass mass will be prevented from penetrating into any of the spaces between the several feeding rolls 6,

'b" and b.

Having thus described my invention, what I claim as new and desire to secure by Letters-Patent is 1. The process of feeding glass to a. forming pass, which comprises supporting a. glass mass on a table composed of a plurality of rolls, the peripheral speed of the several rolls being progressive in the direction of the pass.

2. The method of conveying molten glass in a substantiallyparallel plane to a forming pass, which comprises depositingglass on a table composedof rolls positioned in close proximity to each other and rotating all of said rolls in the direction of the desired travel of the glass at a speed progressively increasingfor the several rolls in accordance with their proximity to the pass.

3. The method ofconveying molten glass to a forming pass which comprises depositing glass on a teeming table composed of rolls and rotating all of the rolls of such table in the same direction but at speeds progressively increasing towards the forming ass.

p 4. The method of rolling plate glass on a multi-roll glass rolling machine which comprises depositing the molten glass on a teeming table formed of a plurality of feeding rolls successively arranged in front of forming rolls and imparting to the feeding rolls circumferential speeds which are smaller than the speed of the forming rolls but which increase relatively from each feeding roll in the direction towards the forming rolls.

.' 5. A plate glass rolling machine comprising cooperative forming rolls and a teeming table composed of at least one teeming and feeding roll arranged in front of the forming rolls, with means for imparting to the teeming and feeding roll a circumferential speed smaller than that of the forming rolls.

6. A plate glass rolling machine comprising a pair of superimposed forming rolls, and at least one teeming and feeding roll arranged in front of the forming roll to form a teeming table, and means for imparting to the teeming and feeding roll a circum erenislial speed smaller than that of forming ro s.

7. In a plate glass rolling machine the 1 combination of cooperative forming rolls, .a

teeming table in front of said forming rolls,

said table being composed of a plurality of feeding rolls arranged in close proximity to each other, and means for rotating the several teeming and feeding rolls at speeds prlcigressivelyvincreasing toward the forming ro s 8. A plate glass rolling machine, compris mg a forming pass, and a teeming table composed of a plurality of closely spaced rollers,

with means for driving the several rollers at peripheral speeds progressively increasing towards the forming pass.

Intestimony whereof I have signed my name to this specification.

LAMBERT VON REIS. 

